Comment:
I just had a700r4 rebuilt with supposely all performance parts and upgrades. It never shifted with a solid shift from the start and after about 10 miles it now has low gear only. upgrades were supposed to be from complete b@m rebuild kit. Is the trans burnt or just me?
You did not say if you had the transmission repair shop (unless a friend did it) do the whole job or if you removed the transmission and had it rebuilt and reinstalled it yourself.
With out having the vehicle in my presence I can only lay out some scenarios. The first thing I would do if the shop you used did the whole rebuild and upgrade job. In other words, you dropped the car off and they did the rebuild to the trans with the B&M upgrade kit and reinstalled it, and you picked the car up completed. If this is the case, take it back for warranty work and discuss the matter with the shop owner in a gentlemanly way. Go for a ride together so there is no mistake about your concerns.
If this is the scenario, than it should be completely covered under warranty. No hassles.
If you did the installation of your rebuilt transmission, than there are a lot of gaps to fill. Installing a used, rebuilt or even new transmission is an art form. It is way more than just tightening a bunch of bolts..Good transmission installers are hard to find and hard to train..There may be more good re builders than installers.
If my shop did the job, it never would have left the shop. We road tested cars for about 15 to 30 minutes, depending largely on whether the car was using a computerized transmission or non computerized unit. I understood that transmissions have heat related issues. I also know that if you wanted certain upgrades such as a B&M kit installed, then it should shift firmly from the first time you hit the road for a test drive..
FYI, I don’t care for B&M products. I always used TransGo upgrade kits, unless they did not make it.
Here is what should be done in order to diagnose why your T-700R4 is not working right…..I’m going to assume that no matter who installed the rebuilt transmission, that these routine installation procedures where followed to a tee.
1. Check the automatic transmission fluid level first..
2. Checking the radiator, cooler lines, fan clutch and cooling system out and being in sold shape.
3. The automatic transmission cooling lines and the cooling portion of the radiator are flushed out using a hi-dollar transmission cooling system flushing machine or a nice product being sold that is in an aerosol can and hooks to the cooler line. It has a built in adapter for the cooler line and uses the proper cleaning agent to get the metal, brass and clutch material crud out of the cooling coils of the radiator and auxiliary cooler if so equipped..If not do it now, well worth installing one, especially if this is a hot-rod or commercial application.
3. Examine all linkages such as the T.V. cable for proper movement during the entire range of usage.
4. Adjusting the T.V. cable to specs. Then fine tuning it during the road test.
5. Hook up hydraulic gauge/s to transmission main line port and check pressures as per manual in R, 1st, 2nd, 3rd, O. D., N, R and Park.
6. Hook up scan tool for extra measure. This is not a computerized transmission, but what the heck, lets see if we have any codes.
These are the most basic tests to do before a decision can be rendered.
This is such a critical issue, that I will continue it tomorrow on our GotTransmissions.com Blog..See you then.
What do we get from the tests and cleaning procedure results.
